Multithreading possible if drives connected to PCI controller?

Hello there,
I have an older (still very funcitonal) G4 (sawtooth) with 2 drives. The system and apps drive is connected to the on-board ATA66 controller. The documents drive is connected to a Sonnet Tempo ATA100 PCI controller. I have the drives in independent channels to allow OS X to multithread between the two.
Both drives are ATA100 and the Sonnet card has 2 independent (I believe) connectors. To get a little better drive throughput I would like to connect both to the Sonnet PCI card. Can I attach my drives to each connector and achieve multithreading? I'm inclined to believe no as the ATA connectors of the PCI card eventually merge in a single connection between the PCI card and the motherboard. I'm not sure if this card is bootable (Sonnet no longer info on it).
Any thoughts? Thanks very much for any feedback you may provide,
Jacobo

Hi
In practice I expect the single connection between the PCI card and logic board probably has little or no impact.
A typical ATA hard drive may have a sustained transfer rate of 60 MBytes/sec.
Each ATA/100 channel has a theoretical transfer rate of 100 MBytes/sec.
A 32-bit PCI card (in a Sawtooth with a 33MHz PCI bus) will have a theoretical transfer rate of ~133 MBytes/sec.
Consequently the PCI card isn't normally a bottleneck, as it has enough bandwidth for a pair of ATA drives.
Also the bandwidth of the entire PCI bus is shared between all the PCI cards installed and all the devices connected to the South Bridge, including the optical drive, zip drive (if present), on-board ATA drives and AirPort card etc.
Consequently no matter where you connect the drives, ultimately the bandwidth is still being shared.
Multithreading usually refers to processors. Even then, although a number of different threads may have been started, only one thread is being executed at any one instance in time (unless you have dual processors).

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MDD can't recognize drive connected via PCI card

Hello there,
I tried connecting a new Maxtor ATA100 drive to my MDD via a Sonnet TEMPO ATA100 PCI card. Everything works OK except that the drive doesn't mount. Disk Utility doesn't "see" it and get this, ... when I tried opening System Profiler to see if the PCI card was recognized, the following was displayed at the bottom of the About This Mac window: Opening border_right.gif. Preview then launched and opened such gif image!
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Rodney,
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Message was edited by: Majordadusma

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nealmay wrote:
Currently I have a hub connected to my airport extreme. There are 2 external hard drives connected to the hub. One has my iTunes library on it, and the other is being used for time machine backups.
I have no problem doing the backup wirelessly to the one hard drive. In time machine, I could pick either external drive to back up to. What I am trying to do is back up the external drive too. Time machine is only seeing the hard drive on my laptop. The exclude list is blank and when I try to add the itunes HD to the exclude list (to remove it), it won't let me select it-- it is greyed out.
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Hello Tristan,
If your stepper motor is TTL compatible you should be able to control it with one of the two counters on the board. Keep in mind that the stepper will ask for a certain amount of power so before attaching it track down how much power it consumes and take a look at the Specifications of the PCI-6111 to be sure that the counters on the board can deliver that amount. If the stepper takes to much power you have to use some kind of power drive which can be controlled with digital (TTL) signals or Analog signals between -10V and +10V.
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Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
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This question was solved.
View Solution.

Hi:
Download and install the Intel chipset driver from the link below.
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Time machine backup from USB drive connected and backing up to Time Capsule

Hi all forum virgin here, so be gentle.
I'll get straight to it. Much net trawling hasn't resulted in a definitive answer on this which surely I'm not alone in
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Slymon2000 wrote:
B- when I remove from MBP and TM backs up again will it see it's not there and delete as a change?
Sooner or later, yes, as LaPastnague says. It depends on when the backups are done. The first backup of each day is kept for a month; all others are deleted after 24 hours. After a month, the first backup of the week is kept as long as there's room, and the others deleted.
Obviously not a reliable solution.
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Well, what you mentioning is possible. However, I don't know whether it's supported (as in, "easy to set up."). Time Machine officially supports backing up to a locally attached drive, to a machine running a Time Machine server (i.e. running OS X Server software), and to a Time Capsule. I don't know that it officially supports a drive attached to an AirPort or to a Time Capsule. Though I know some people have gotten it to work.
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Imac has crashed..need new hard drive....had external drive connected...was using time machine.....so...itunes file should be on external drive....how do i import them to my new mac mini?

my iMac has crashed...was told I need a new hard drive.....meantime I bought a mac mini.....I had an external drive connected to the mac....and was using time machine for backups....so....how do i move itunes music files to my new mac mini from the external drive?

Turn Time Machine OFF temporarily in its preference pane. Leave the window open.
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Now you should be able either to copy the item in the Finder or to restore it in the time-travel view. If you use the time-travel view, be sure to select the snapshot you just modified. If successful, repeat the operation with the other items you were unable to restore. You can select multiple items in the Finder and open a single Info dialog for all of them by pressing the key combination option-command-I.
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Multithreading possible if drives connected to PCI controller?

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